One river. Five roles.

Each player controls one operational discipline. The room records decisions in order, checks role authority and protects the shared state from conflicting updates.

Authoritative room state in Supabase
Hydrology remains governed by MHIE
Reconnectable room and decision history

Operations lobby

Create a coordination room

No email is required. This device receives a private player identity.

One browser profile owns one player seat. To test or play two seats on one device, use separate browser profiles.